Friday, 23 October 2026
International edition · English
Surprising, threatened or little-known species: biology, habitat, conservation status and facts checked against scientific sources.
15 articles · RSS
It lives only in the canals of Xochimilco, in Mexico City, never loses its juvenile look and can regrow legs, tail and even parts of organs. While it thrives in labs and aquariums, in the wild it is on the brink of extinction.
Vulnerable, endangered, critically endangered... Behind each label are very specific scientific criteria. We explain how the world's most widely used tool for measuring extinction risk works.
There are only a few dozen of them, they live between the Strait of Gibraltar and the Bay of Biscay and since 2020 they have been interacting with the rudders of sailing boats. We review what is known —and what is not— about this unique population.
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